Improvement in blind-mortising machines



matted 5mm @sont @Witte TO HIMSELF AND AARON H. ORAGIN, OF SAME PLAGE,

Letters Patent N 97,040, dated November 23, 1869.

IMPROVEMENT IN BLIND-MORTISING- MACHINES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom. it may concern.- f

Be it known that I, MARTIN BUCK, of Lebanon, in the county'of Grai'ton,and State of New `Hampshire, have invented a new and improvedBlind-"WortisinglyIachine; and I do hereby declare thatV the followingis a full, clear, and exact description thereot, which will enableothers skilled in the art to make and use -the same, reference heilighad to the accompanying drawing, forming part of this specification.

This invention relates to improvements in machines for boring andmortising blinds, such as patented to Leonard \Vorcester, July 5, 1859,No. 24,688, and has for its object to provide certain improvementscalculated to increase the'eiiiciency ofthe same.

The invention consists iu arranging the levers which move the slidescarrying the stiles to be bored and inortised to and from the boring ormortising-to0ls,.

for adjustment, so that the. said slides may have a greater or lessmovement, as required by the nature of the' work.

It also consists in an arrangement of interchangeable ratchet-bars withratchet-teeth of differentpitch for val-'ying the movement ot' thestiles past the cutter, for diiferent kinds of work. It also consists inan adjustable arrangement of the reciproca-ting boring or mortisingtool-carrying carriage for varying the. angle otl the slots.

It also consists in an improved construction of mortising orslotting-tool, all as hereinafter more fully spcritied.

Figure 1 represents a plan view of the machine which is the subject ot'my improvements.

Figure 2 represents a sectional elevation of the same, taken on the lineoi'tig.1.

Figure 3 represents a sectional detail, taken on the line y y.

Figure 4 represents my improved mort-ising-tool, in sidevew andlongitudinal section.

Similar letters of reference indicate corresponding parts.

A represents two carriages, provided with grooved,

blocks, l, through which the slides C, carrying ratchet-bars O', towhich the blind stiles to be bored or mortised are clamped, move acrossthe said carriages to feed the stiles along past the nxortising andboring tool D.

These carriages A, are. moved back and forth by vibrating levers E, setinto motion by calns F, on the shaft G, the said cams having groovesinto which pins on the ends ofthe levers E take. g

These levers are pivoted at H, and have hitherto been madcunadjusta-ble.

I now propose to provide for these levers adjustable pivots or fulcrafor the purpose ot' varying the movements of these carriages as requiredby the various kinds and dimensions of work which these machines arerequired to do, and which I have found in practice that is is veryimportant to be able to do.

InI this example I have represented a series ot' pivot-bolt holes on thesaid levers, through any one of' which the bolt may be made to pass, byadjusting the levers back or forth; but I contemplate variousother-methods of adjusting them, as slotting they said levers to work onthe furcrul'n-pins, and arranging the latter to be moved back and forth,or other wellknown methods may be used.

The bars O', to which the stiles are clamped, to be fed along pastvthctool, are moved intermittiugly by pawls I, pivoted to a sliding block,K, moved back and forth by a tappet- L, on the shaft G, working 'againstthe projection M, for throwing it back, and

the projection N for throwing forward, the said pawls taking intoratchet-teeth on the said bars.

This arrangement only admit-s of moving thc stiles a stated distance,which is', ,not suited to all work. I have, therefore, provided for,dciaehably connectlngr the rack-bars O', so that bars having notchesequal in length to the throw of the-'pawls maybe used, 'or they maybeslightly more than one-third the distance, so that they will be movedthe dist-ance ot'two notches,`or slightly more than half the throw, soas to he moved the distance of one notch, and other like adjustments maybe made, so that any required variation of throw may be effected.

The ratchet-bars C may be made of wood, metal,

or any other substance, and may be connected by screws, clamps, or othersuitable means, to the slides C, in anyway, for ready attachment ordetachment.

The boring and mortising-tool 'D is borne in a rcvolving spindle O,mounted on an inclined reciprocating carriage 1),-deriving motion from acrankshaft, Q.

rlhis carriage is reciprocatcd when cuttingmortises, and carries therevolving tool back and forth-against' the face ofthe stiles, at thesame time they are pressed up by the levers E against the tool, makingan elongated mortise or slot ot' the same inclination as tha ot' theguides ot' the carriage l.

Then the stiles are to he .bored only, the carriage F is notrcciprocatcd, but the tool D is rotated, as it is also when nlortising.

It receives motion by a belt from the bclt\\'lieel It.

My improvement in the arrangement oi' the borlng and mortising-toolcarriage consists in providing adjustable guides S for thc saine,whcrcoy the angle oi the slots may be vaiied as required by changing thesaid guides.

In this cose, Ihnve represented the said guides as 'nf downto an edge,:is represented in iig. 4,- which provides in 'n.chenp way a. veryeficient cutting-tool lor the purpose.

Hnvingthns described my invention,

What I ein-im is new, and desire to secure by Letters lnten'r, isl 1j Ablind-mortsin.: machine, provided with slides C, :ind ratchet-bars C',having notches thereon of differenti piteh. :is :ind for the purposespecified.

2. A blimi-inorrising nmchne, provided with vihmting,r m'nls E, forvarying the throw of t-he carriages,

as shown und described.

MARTIN BUCK.

Witnesses WILLIAM B. WEEKS, ,WiL F. DAvs.-

